Where does autoconf's AC_CHECK_HEADERS verify the header files?

Question

I am having trouble with compiling one of the open source libraries (libopekele OpenID lib).

The problem is I don't have sudo access on the system where I need to compile this.

Ran the configure. It complained of missing htmltidy lib. Installed the htmltidy at a non-standard path /home/geekgod (as I dont have access to the /usr and /usr/local).

Now the problem is how do I make the configure script of libopekele to pick the the headers from /home/geekgod/include.

Poking into the configure.ac script of libopkele, it is using AC_CHECK_HEADERS to search for tidy.h or tidy/tidy.h. I am pretty sure it is looking for these at standard location (/usr/include). How do I add /home/geekgod to the standard include dir?

To answer your question mechanically: `AC_CHECK_HEADERS` compiles a small test program, using the compiler for whichever language is selected by `AC_LANG_PUSH` and `AC_LANG_POP` (C is the default). This sees `CPPFLAGS`, which is how you pass additional search paths to the compiler. — Jack Kelly, Feb 11 '11 at 04:57

score 23 · Accepted Answer · answered Feb 09 '11 at 03:22

23

try this:

./configure CPPFLAGS=-I/home/geekgod/include --prefix=... --etc

answered Feb 09 '11 at 03:22

zwol

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+1: You'll probably also want to add LDFLAGS=-L/home/geekgod/lib – William Pursell Feb 09 '11 at 03:51
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Thanks guys, I required both LDFLAGS and CPPFLAGS to be set. – rajeshnair Feb 09 '11 at 20:17

Where does autoconf's AC_CHECK_HEADERS verify the header files?

1 Answers1